URL in address bar - login and password inputs are ignored

What's this all about? I'm trying to connect to the ftp for a advertising agent to upload new artwork. Their address is just an IP so what do I do?

If it's a public server and you just have an IP, select "Anonymous" from the address bar. Then username and password are ignored.

Strange, I guess it was checking the anon by default or something cause what I was saying is that I do have a un/pw but it wasn't letting me add them. It seems to be okay now.